Prevention measures of root diseases in fruit trees
In the process of fruit cultivation, people pay more attention to the prevention and control of diseases and pests such as fruit trunks, branches and leaves. The prevention and treatment of root diseases of fruit trees is often neglected, and the yield and life span of fruit trees are seriously affected. There are many diseases in the roots of fruit trees. In order to increase fruit tree production and prolong the life of fruit trees, we must pay attention to the prevention and treatment of root diseases of fruit trees. The main diseases of the root rot of the spotted root: mainly harming fruit trees such as pome fruits, stone fruits and walnuts. Plants with wilting, curling, dehydration and dryness of leaves, reddish-brown halo with main veins spreading, branches dry, cortical necrosis easily stripped; fibrous roots turning brown and dead, reddish-brown round spots at the base of the disease, deep in the xylem, black roots death. Root rot: Harms pears, apples, hawthorn, apricots, etc. Partial or whole plant leaves are small and thin, yellowing off. The new shoots are short and the fruit is small; the roots are immersed in purple and ulcerated, with white fan-like mycelium between the cortex and xylem, mushroom flavor, and fluorescence. White lice disease: Orchards with sandy beaches, heavy soil, and poor drainage are prone to occur. Pome fruits, stone fruits, grapes, oranges and wild jujube all occur. The diseased area was in the rhizome, the lesions were brownish brown, long white mycelium, long brown sclerotia in diseased and surface cracks. White feather disease: endanger a variety of fruit trees. Invasive fine roots first, and then extended to lateral roots, main roots. On the surface of the diseased roots, white or gray-white reticular mycelia or rhiform mycelia were present, and round black sclerotia were produced in the decayed xylem. Physiological rot: Poorly drained viscous soil, excessive salt content, too high groundwater level or drought-prone orchards are susceptible to disease. The long-term water in the roots, the roots without root hair, and the cortex rot; the main roots are dry and dead, and the leaf margins are charred and yellow. Prevention and control measures: Increase organic fertilizer or application of bacterial fertilizer and cake fertilizer to increase tree vigor; drain accumulated water; remove mycorrhiza, sterilize roots for sterilization, replace sterile soil; use pesticides to disinfect, use 250-500 times of sodium pentachlorophenol , 70% thiophanate-methyl 1000 times solution, 50% Benzolide 1000-2000 times solution, 70% pentachloronitrobenzene, 50-100 grams of medicinal solution per plant, small tree per plant solution 150 ~300 grams, mixed with new soil applied to the roots. Food Ingredients,Food Additives Ingredients,Natural Sweetener Food Ingredients,Nutritional Food Ingredients Nanjing Sunshine Biotech Co., Ltd , http://www.sunshine-bio.com